Corydoras aeneus, or....

[bslindgren]

I have these Cory's that were bought as

Corydoras aeneus

. I just got some pictures of them the other day, and the larger one (bought from a proper LFS) and the smaller ones do differ a bit. I know there's quite a bit of variation in that species depending on origin, but I thought I would request confirmation from the experts, just in case.
This is the older one I have.


and this is one of the three smaller ones (from Walmart I confess)


and another picture of one of the large ones.


In the top photo, the snout seems a bit longer, but it could be an artifact of the photo. The other difference is that the small ones have rather distinct black spots, whereas the larger one seems to have a longer black mark (shown better in the bottom photo which was taken before I had the current tank set up). I assume they are just variations, but I was happy with the photos, so this gave me a reason to post!!